/* Renders texture directly to render buffer. */
static void shader_preview_texture(ShaderPreview *sp, Tex *tex, Scene *sce, Render *re)
{
/* Setup output buffer. */
int width = sp->sizex;
int height = sp->sizey;
/* This is needed otherwise no RenderResult is created. */
sce->r.scemode &= ~R_BUTS_PREVIEW;
RE_InitState(re, NULL, &sce->r, &sce->view_layers, NULL, width, height, NULL);
RE_SetScene(re, sce);
/* Create buffer in empty RenderView created in the init step. */
RenderResult *rr = RE_AcquireResultWrite(re);
RenderView *rv = (RenderView *)rr->views.first;
rv->rectf = MEM_callocN(sizeof(float) * 4 * width * height, "texture render result");
RE_ReleaseResult(re);
/* Get texture image pool (if any) */
struct ImagePool *img_pool = BKE_image_pool_new();
BKE_texture_fetch_images_for_pool(tex, img_pool);
/* Fill in image buffer. */
float *rect_float = rv->rectf;
float tex_coord[3] = {0.0f, 0.0f, 0.0f};
bool color_manage = true;
for (int y = 0; y < height; y++) {
/* Tex coords between -1.0f and 1.0f. */
tex_coord[1] = ((float)y / (float)height) * 2.0f - 1.0f;
for (int x = 0; x < width; x++) {
tex_coord[0] = ((float)x / (float)height) * 2.0f - 1.0f;
/* Evaluate texture at tex_coord .*/
TexResult texres = {0};
BKE_texture_get_value_ex(sce, tex, tex_coord, &texres, img_pool, color_manage);
rect_float[0] = texres.tr;
rect_float[1] = texres.tg;
rect_float[2] = texres.tb;
rect_float[3] = 1.0f;
rect_float += 4;
}
/* Check if we should cancel texture preview. */
if (shader_preview_break(sp)) {
break;
}
}
BKE_image_pool_free(img_pool);
}
void BKE_texture_get_value(
const Scene *scene, Tex *texture,
float *tex_co, TexResult *texres, bool use_color_management)
{
BKE_texture_get_value_ex(scene, texture, tex_co, texres, NULL, use_color_management);
}
